CN104878926A - Suspended template system construction method and turnover brackets - Google Patents

Abstract

The invention discloses a suspended template system construction method and turnover brackets. The suspended template system construction method comprises steps as follows: performing stress calculation, determining component models and layout, mounting and adjusting the turnover brackets, mounting main ridges and auxiliary ridges, laying templates on the auxiliary ridges, binding reinforcing steel bars to the templates, pouring concrete, dismounting the main ridges at intervals, sequentially dismounting the auxiliary ridges and the templates and the like. Each turnover bracket comprises a bracket body, a supporting rod, a fixing base, a locking bolt and other components. According to the suspended template system construction method and the turnover brackets, the on-site construction and mounting operation is convenient, the construction efficiency is high, welding and cutting operation is avoided, and turnover of the brackets can be completely realized for use.

Description

A construction method of a suspended formwork system and a turnable support

technical field

The invention relates to a formwork construction method and a construction tool, in particular to a construction method and a support for a suspended formwork system.

Background technique

At present, with the emergence of the beam-slab design of H-shaped steel beams and reinforced concrete floors in urban high-rise structures, a new type of formwork system has emerged: section steel suspension formwork. The shaped steel suspension formwork makes full use of the H-shaped steel beams installed first, sets the steel bar suspension rings on it, places the shaped steel according to the designed spacing, and lays the square wooden formwork on the upper part of the shaped steel. Among them, the steel bar suspension ring, which is the stressed component of the section steel, has been poured in the concrete after the pouring of each floor slab is completed, and the remaining parts need to be removed by cutting with acetylene. This operation will cause a certain amount of labor and material input, and it is a hot work, and the ring material cannot be turned over.

Contents of the invention

Purpose of the invention: The purpose of the present invention is that the existing construction method of the suspended formwork system needs to install non-detachable suspension rings, which is time-consuming, laborious and cannot be used repeatedly.

Technical solution: The construction method of the suspended formwork system according to the present invention includes the following steps:

Step 1. According to the main steel girder spacing of the building structure itself, the self-weight of the reinforced concrete on the floor and the construction load parameters, the force calculation is performed to determine the thickness of the formwork, the model of the turnable support, the model of the main flute, the model of the secondary flute, the spacing of the main flute and the secondary flute. flute spacing;

Step 2: Carry out setting-out positioning for the position of the main flute, and install the base of the turnable support on the lower flange of the main steel beam at each position;

Step 3, adjust the support height of the turnable support, so that the height of the support top of the turnable support from the upper flange plate of the main steel beam = template thickness + secondary flute height + main flute height, and the height error is less than 2mm;

Step 4, setting fasteners for positioning the secondary flute on the main flute, and the spacing of the fasteners on the same main flute is the same as the spacing of the secondary flute;

Step 5: Use cables to hoist from both ends of the main flute, so that the two ends of the main flute are respectively placed on the tops of the two turnable supports at the corresponding positions of the two adjacent main steel beams, and each main flute is numbered ;

Step 6, vertically install the secondary flute on the main flute, and the secondary flute is embedded on the fasteners at the same position of each main flute;

Step 7, laying the formwork on the secondary flute, and the installation direction of the formwork is perpendicular to the secondary flute, and relatively fixing the formwork and the secondary flute;

Step 8, binding steel bars above the formwork and pouring concrete.

The installation of revolvable supports is used to support each main flute, and the height of the main flute can be adjusted according to the needs, which not only avoids the use of non-detachable lifting rings, but also facilitates adjustment and high construction accuracy; the use of fasteners on the main flute can facilitate the positioning of the secondary The location of the flute effectively improves the efficiency of the construction of the secondary flute; the use of numbering each main flute can facilitate the turnover of other similar construction structures, and further improves the overall construction efficiency; relatively fixing the formwork and the secondary flute can prevent the formwork from being damaged during the construction process. Tilt and move.

As a further improvement of the construction method of the present invention, it also includes the following steps:

Step 9, after meeting the form removal requirements, remove the main flute at intervals;

Step 10, remove the secondary flute and formwork in sequence, separate the formwork and secondary flute, and number the formwork and secondary flute at the same time.

Removing the main flute at intervals can effectively prevent the secondary flute and formwork from falling off in a large area, improving the safety of formwork removal; adopting numbering of formwork and secondary flute can facilitate the turnover of other similar construction structures, and further improve the overall construction efficiency.

As a further limiting solution of the present invention, in step 5, the support point of the revolvable support is at least 100 mm away from the corresponding end of the main flute. This design requirement can effectively prevent the main flute from falling off, further improving the safety of the main flute construction.

As a further limiting scheme of the construction method of the present invention, in step 6, the butt joints of the two butt-joint secondary flutes in each column are staggered from each other, and the butt joints are all located above the main flute. This design can improve the stability of the corrugated construction and installation, and prevent breakage at the butt joints of the corrugated corrugated.

As a further limiting scheme of the construction method of the present invention, in step 7, the joints of each formwork are arranged above the second flute, and the gap width at the joints is less than 3mm. This design requirement can improve the stability of corrugated construction and installation, and prevent fractures at the formwork joints.

As a further limiting scheme of the construction method of the present invention, tapes are pasted at the joints of the templates. Adhesive adhesive tape is used to paste the joints of the templates to prevent slurry leakage from the joints of the templates.

The present invention also provides a turnable support used for the construction method of the suspended formwork system, including a support, a support rod, a fixing seat and a locking bolt; a vertically downward upper threaded sleeve is arranged at the bottom of the support; The upper and lower ends of the support rod are respectively provided with upper and lower threads; the fixed seat is a C-shaped structure, and a lower threaded sleeve is provided above the upper side plate of the fixed seat; the locking bolt is screwed on the lower side plate of the fixed seat and a pressure plate is arranged on the top of the locking bolt; the pressure plate is interposed between the upper side plate and the lower side plate of the fixing seat; the upper thread and the lower thread are screwed with the upper threaded sleeve and the lower threaded sleeve respectively. Support brackets, support rods and fixed seats are used to form a detachable lifting structure, which is convenient for dismantling and turnover after the construction of the hanging formwork, avoiding the waste of steel materials, and at the same time avoiding hot work and improving construction efficiency; using locking The bolts can relatively fix the position of the supporting device during construction, which improves the construction safety and stability of the device.

As a further limiting solution of the revolving support of the present invention, it also includes at least one adjusting sleeve, an internally threaded hole is provided at the upper end of the adjusting sleeve, and an externally threaded post is provided at the lower end. The adjustment sleeve can extend the length of the adjustment support rod, so that the device has better height adaptability.

As a further limiting solution of the revolving support of the present invention, a rotating handle perpendicular to the support rod is provided on the support rod. The use of the rotating handle can facilitate the rapid manual rotation of the support rod, which improves the construction efficiency.

As a further limiting solution of the revolvable support of the present invention, an internally threaded sleeve is provided on the lower side plate of the fixing seat, and the locking bolt is screwed into the internally threaded sleeve. The use of the inner threaded sleeve can further improve the fixing performance of the locking bolt.

Compared with the prior art, the present invention has the beneficial effects as follows: (1) The installation of the revolvable support is used to support each main flute, and the height of the main flute can be adjusted according to the needs, which not only avoids the use of non-detachable lifting rings, but also facilitates adjustment , high construction accuracy; (2) Using fasteners on the main flute can easily locate the position of the secondary flute, effectively improving the efficiency of the construction of the secondary flute; (3) Using numbering for each main flute can facilitate the turnover of other identical construction structures (4) Relatively fixing the formwork and the second flute can prevent the formwork from lifting and moving during the construction process.

Description of drawings

Fig. 1 is the schematic flow sheet of construction method of the present invention;

Fig. 2 is a schematic diagram of the structure of the revolvable support of the present invention.

In the figure, 1. Support bracket, 2. Support rod, 3. Adjusting sleeve, 4. Fixing seat, 5. Upper threaded sleeve, 6. Upper thread, 7. Lower thread, 8. Rotary handle, 9. External thread Column, 10, lower threaded casing, 11, internally threaded casing, 12, locking bolt, 13, pressing plate.

Detailed ways

The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the embodiments.

Example 1:

As shown in Figure 1, the hanging formwork system construction method of the present invention comprises the following steps:

Step 1. According to the main steel girder spacing of the building structure itself, the self-weight of the reinforced concrete on the floor and the construction load parameters, the force calculation is performed to determine the thickness of the formwork, the model of the turnable support, the model of the main flute, the model of the secondary flute, the spacing of the main flute and the secondary flute. flute spacing;

Step 2: Carry out setting-out positioning for the position of the main flute, install the base of the turnable support on the lower flange of the main steel beam at each position, and set signs at positions that are concealed or covered by the next process. The mark should be clean and not contaminate other parts;

Step 3: Adjust the supporting height of the turnable support so that the height of the support top of the turnable support from the upper flange plate of the main steel beam = template thickness + secondary flute height + main flute height, and the height error is less than 2mm. After the installation is completed, it should be checked and accepted one by one to ensure that it is fixed firmly and the elevation deviation meets the requirements;

Step 4: Install fasteners on the main flute for positioning the secondary flute, and the spacing between the fasteners on the same main flute is the same as that of the secondary flute. The main flute can be made of Q345B I-beam, and the processing length = corresponding clear span - 100mm, the fastener is U-shaped, directly welded on the main flute;

Step 5: Use cables to hoist from both ends of the main flute, so that the two ends of the main flute are respectively placed on the tops of the two turnable supports at the corresponding positions of the two adjacent main steel beams, and each main flute is numbered , it is required that the top support point of the turnable support should be at least 100mm away from the corresponding end of the main corrugation;

Step 6. Vertically install the secondary flute on the main flute, and the secondary flute is embedded on the fasteners at the same position of each main flute. The secondary flute can be made of square wood. The cantilever length of the secondary flute should not be too long, otherwise the main flute should be encrypted , it is required to stagger the butt joints of the two butt joints of the front and rear of each row, and the butt joints are all located above the main flute;

Step 7. Lay the formwork on the secondary flute, and the installation direction of the formwork is perpendicular to the secondary flute, and relatively fix the formwork and the secondary flute. The formwork can be made of polymer plastic formwork, and the gap between the formwork and the cylinder can be filled with foam glue Blocking, it is required to set the joints of each formwork above the secondary corrugated, and the gap width of the joints is less than 3mm, and stick tape on the joints of each formwork;

Step 8: Bind the steel bars above the formwork and pass the acceptance of all parties, and then pour concrete according to the design strength level and floor thickness. During the pouring process, the concrete must be spread in time, vibrated and compacted, and it is strictly forbidden to pile up too high. After the concrete is poured and tamped, the excess laitance layer must be scraped off in time with a scraper, and the surface of the concrete should be scraped and leveled according to the elevation control point set. And timely cover maintenance;

Step 9: After the concrete strength of the floor slab reaches the required formwork removal strength and a form removal order is issued, the construction workers on the two mobile working frames are required to remove the main flute at intervals, and it is required to reduce the height of the two turnable supports at both ends of the same main flute at the same time , and place the two ends of the main flute on the lower flanges of two adjacent main steel beams, and then two construction workers at the top and bottom will transfer and place the main flute down to the floor;

Step 10, remove the secondary flute and formwork in sequence. When the main flute is removed, the secondary flute and formwork will separate from the concrete surface by their own weight, and then separate the formwork and secondary flute, and number the formwork and secondary flute at the same time.

Example 2:

As shown in Figure 2, the revolvable support of the present invention includes: a support 1, a support rod 2, a fixing seat 4 and a locking bolt 12; a vertically downward upper threaded sleeve 5 is provided at the bottom of the support 1; The upper and lower ends of the support rod 2 are respectively provided with an upper thread 6 and a lower thread 7; the fixed seat 4 is a C-shaped structure, and a lower threaded sleeve 10 is provided above the upper side plate of the fixed seat 4; the locking bolt 12 is screwed together On the lower side plate of the fixed seat 4, and on the top of the locking bolt 12, a pressure plate 13 is provided; the pressure plate 13 is between the upper side plate and the lower side plate of the fixed seat 4; the upper thread 6 and the lower thread 7 are respectively connected with The upper threaded sleeve 5 and the lower threaded sleeve 10 are screwed together.

In order to be able to adjust according to the needs of the supporting height, the supporting device of the present invention is also designed with at least one adjusting sleeve 3 , an internally threaded hole is arranged at the upper end of the adjusting sleeve 3 , and an externally threaded post 9 is provided at its lower end. When in use, the upper thread 6 can be screwed with the internal thread hole of the adjustment sleeve 3, and the external thread column 9 can be screwed with the lower threaded sleeve 10, thereby extending the height of the support rod 2.

In order to facilitate manual and quick rotation of the support rod 2 , the revolvable support of the present invention is provided with a rotation handle 8 perpendicular to the support rod 2 on the support rod 2 , preferably two symmetrical rotation handles 8 .

In order to facilitate the placement and positioning of the main flute, the revolvable support of the present invention is provided with baffles on the left and right sides of the support 1, and the baffles and the support 1 together form a U-shaped structure.

In order to further tighten the fixing performance of the bolt, the revolvable support of the present invention is provided with an internally threaded bushing 11 on the lower side plate of the fixing seat 4 , and the locking bolt 12 is screwed with the internally threaded bushing 11 .

In specific production, the dimensions of each component are as follows:

The fixed seat 4 is made of 8mm Q235 steel plate, and the steel plate is made into a C shape. The size of the upper side plate of the C type is 100mm×100mm, and the lower threaded sleeve 10 is welded on the upper side plate, and the outer diameter of the lower threaded sleeve 10 is 46mm, inner diameter 32mm, height 40mm, with internal thread; the size of the lower side plate of C type is 100mm×60mm, and the distance between the upper side plate and the lower side plate is 50mm.

The supporting rod 2 adopts a Q235 steel rod with a diameter of 32mm, and the length is 150mm, and the lengths of the upper thread 6 and the lower thread 7 are both 40mm.

The upper part of the adjustment sleeve 3 has a length of 50mm (not including the threaded section), an outer diameter of 46mm, an inner diameter of 32mm, and a depth of 40mm; the length of the lower threaded column 9 is 30mm, and the outer diameter is 32mm. Design situation increase and decrease adjustment sleeve 3.

The support 1 is made of 6mm Q235 steel plate, the width is 150mm, the height of the side plates on both sides is 50mm, and the upper threaded casing 5 with the outer diameter of 46mm, the inner diameter of 32mm and the height of 40mm is welded at the center of the bottom, and the supporting rod 2 is connected. connect.

The diameter of rotary handle 8 is 5mm, and length is 100mm.

The locking bolt 12 is a diameter M24 bolt, and the size of the pressing plate 13 is 60 mm * 60 mm * 8mm.

During the construction of the revolvable support of the present invention, the main corrugated position is first set out and positioned on the main steel girder, and then the fixing seat 4 is installed on the lower flange of the main steel girder at the main corrugated position, and the portal scaffolding is used for erection during installation. Move the work frame; then install the support rod 2 and the upper support 1, adjust the support rod 2 so that the elevation of the support 1 is at the design position, so far, the installation of the revolvable support is completed; after the installation of the revolvable support , install and suspend the main flute, secondary flute and formwork in sequence, and construct the related procedures of subsequent reinforced concrete; when the strength of the concrete floor meets the requirements for dismantling the formwork, the suspended formwork system can be dismantled, and the dismantling is carried out in the following order: adjust the support rod 2, lower the support Support 1 height → remove the suspended steel beams at intervals → remove the wooden squares and formwork in sequence → remove the remaining steel beams → remove the fixing seat 4.

As stated above, while the invention has been shown and described with reference to certain preferred embodiments, this should not be construed as limiting the invention itself. Various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. a suspension formwork system construction method, is characterized in that: comprise the steps: Step 1. According to the main steel girder spacing of the building structure itself, the self-weight of the reinforced concrete on the floor and the construction load parameters, the force calculation is performed to determine the thickness of the formwork, the model of the turnable support, the model of the main flute, the model of the secondary flute, the spacing of the main flute and the secondary flute. flute spacing; Step 2: Carry out setting-out positioning for the position of the main flute, and install the base of the turnable support on the lower flange of the main steel beam at each position; Step 3, adjust the support height of the turnable support, so that the height of the support top of the turnable support from the upper flange plate of the main steel beam = template thickness + secondary flute height + main flute height, and the height error is less than 2mm; Step 4, setting fasteners for positioning the secondary flute on the main flute, and the spacing of the fasteners on the same main flute is the same as the spacing of the secondary flute; Step 5: Use cables to hoist from both ends of the main flute, so that the two ends of the main flute are respectively placed on the tops of the two turnable supports at the corresponding positions of the two adjacent main steel beams, and each main flute is numbered ; Step 6, vertically install the secondary flute on the main flute, and the secondary flute is embedded on the fasteners at the same position of each main flute; Step 7, laying the formwork on the secondary flute, and the installation direction of the formwork is perpendicular to the secondary flute, and relatively fixing the formwork and the secondary flute; Step 8, binding steel bars above the formwork and pouring concrete. 2. The construction method of hanging formwork system according to claim 1, characterized in that: it also comprises the steps of: Step 9, after meeting the form removal requirements, remove the main flute at intervals; Step 10, remove the secondary flute and formwork in sequence, separate the formwork and secondary flute, and number the formwork and secondary flute at the same time. 3. The construction method of the suspended formwork system according to claim 1 or 2, characterized in that: in step 5, the support point of the turnable support is at least 100 mm away from the corresponding end of the main flute. 4. The construction method of the hanging formwork system according to claim 1 or 2, characterized in that: in step 6, the butt joints of the two butt-joint secondary flutes at the front and back of each column are staggered from each other, and the butt joints are all located above the main flute. 5. The construction method of the suspended formwork system according to claim 1 or 2, characterized in that: in step 7, the butt joints of each formwork are arranged above the secondary corrugated, and the gap width at the joints is less than 3 mm. 6. The construction method of the suspended formwork system according to claim 5, characterized in that adhesive tapes are pasted at the joints of each formwork. 7. A turnable support used for the construction method of the suspended formwork system according to claim 1, characterized in that it includes a support (1), a support rod (2), a fixing seat (4) and a locking bolt ( 12); at the bottom of the support (1) is provided with a vertically downward upper threaded sleeve (5); at the upper and lower ends of the support rod (2) are respectively provided with an upper thread (6) and a lower thread (7); fixed The seat (4) is a C-shaped structure, and a lower threaded sleeve (10) is provided above the upper side plate of the fixed seat (4); the locking bolt (12) is screwed on the lower side plate of the fixed seat (4) , and a pressure plate (13) is provided on the top of the locking bolt (12); the pressure plate (13) is between the upper side plate and the lower side plate of the fixing seat (4); the upper thread (6) and the lower thread (7 ) are screwed with the upper threaded sleeve (5) and the lower threaded sleeve (10) respectively. 8. The revolvable support according to claim 7, characterized in that it further comprises at least one adjusting sleeve (3), an internally threaded hole is provided at the upper end of the adjusting sleeve (3), and an externally threaded post is provided at the lower end (9). 9. The revolvable support according to claim 7, characterized in that: a rotating handle (8) perpendicular to the support rod (2) is provided on the support rod (2). 10. The revolvable support according to claim 7, characterized in that: an internally threaded bushing (11) is provided on the lower side plate of the fixing seat (4), and the locking bolt (12) and the internally threaded bushing (11) Phase rotation.